get("#369") -- Magic Wand, optimized
get("#349") -- table functions
get("#380") -- hashImage

wandSize = 3

allrects = magicWandAll(img)

function stringtorect(s)
  local _, _, x1, y1, x2, y2 = string.find(s, "(%d+),%s*(%d+),%s*(%d+),%s*(%d+)")
  x1, y1, x2, y2 = tonumber(x1), tonumber(y1), tonumber(x2), tonumber(y2)
  return newRectangle(x1, y1, x2-x1, y2-y1)
end

result = {}
for s, _ in pairs(allrects) do
  r = stringtorect(s)
  cropped = {width=r.width, height=r.height,
    getInt = function(x, y) return img.getInt(x+r.x, y+r.y) end}
  hash = hashImage(cropped)
  table.insert(result, s.." -> "..hash)
end
result = table.concat(result, "|")
if result ~= '' then
  return "Magic Wand + hashes (wand size="..wandSize.."): "..result
end

Began life as a copy of #385